he joins us from boston. the north koreans seem to like star power when it comes to those who come to pay a visit. so i presume that's what bill clinton brings, as opposed to either former vice presidents or other former members of the administrations. >> right. it's always good that if you have that star power, you know if you have a george clooney why send a ted danson to fix things that bill clinton is probably the most popular figure on this planet at this particular moment. >> and tell us about some of the other ex-presidents who've been sent on diplomatic missions. we mentioned of course jimmy carter, what about him? >> well, jimmy carter played a really important role in bringing about a democratic free election in nicaragua following the sandinista regime's fall several years ago. at the same time, richard nixon played a key role and helped lessening tensions between the united states and china following tiananmen care. the bush administration had sent him on that mission. so i think presidents can pl